Poplar Wood Pretreatment Using Deep Eutectic Solvents for Promoting Enzymatic Hydrolysis

Bioethanol produced from lignocellulose is a renewable energy substitute for traditional fossil fuels. Poplar wood as forest waste popular in bioethanol production. Nonetheless, the complex structure of leads to low reducing sugar and ethanol yields. Thus, pretreatment necessary promote enzymatic hydrolysis. Deep eutectic solvents (DESs) have good dissolution capacity, vapor pressure, simple synthesis procedure, cost toxicity. More more researchers begun paying attention application DESs pretreatment. In this work, poplar was pretreated using series basic based on diol. The effects DES species, basicity solvents, temperature time effectiveness enzyme hydrolysis were investigated, characterization analysis (Fourier transform infrared spectroscopy, X-ray diffraction scanning electron microscopy) carried out reveal mechanism. best effect obtained K: 1, 2-PG, which removed 89.2% 71.6% lignin hemicellulose, respectively, while preserving 97.5% cellulose at 130 °C 7 h. This enhanced yield 82.5% relative that raw sample (3.3%) after 72 h results demonstrated hemicellulose removed. Therefore, 2-PG promising solvent pretreatment, could improve industrial production bioethanol.